Modem adsl usb nortek2021

I run a debian sarge 3.1 2.6 stable.I got a nortek2021 adsl modem apparently is supported i have cecked http://eciadsl.flashtux.org/modems.php but i have no experience in setting up modem and ppp connections since i had a router.Could someone point me to a link where all this is explained?From setting up the modem to the ppp connection will be helpfull,thanks !